.active{
    color: red;
    font-size: 0.2rem;
}
.bottom{
    width: 3.75rem;
    height: 0.8rem;
    background: wheat;
    font-size: 0.18rem;
    position: fixed;
    bottom: 0px;
    line-height: 0.8rem;
}

.bottom .li{
    margin-left: 0.3rem;
}
